According to topological structure of control mesh, we generate generalized rational parametric surfaces in two manners.
对于广义有理参数曲面，根据控制网格的拓扑结构，我们分成两种情况来考虑。
The fast point-by-point algorithm for generating rational parametric surfaces has important application in computer graphics.
有理参数多项式曲面的快速逐点生成算法在计算机图形学中有重要的应用。
However, due to the advantages of implicit curves and surfaces which the parametric curves and surfaces don't have, sometime we need to use the implicit form of a rational curves and surfaces.
然而由于曲线曲面的隐式形式具有参数形式所不具有的优点，有时我们还需要求参数曲线曲面的隐式表达式。
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